As well as Mrs Goodchild, her brother Luke Dorsett, his partner Roozbeh Araghi and Sydney-based New Zealand expat Cindy Low all died in the incident.

Ms Low's 10-year-old son also escaped after being thrown from the raft in what police have described as a "near miracle".

Ray Dorsett, Kate and Luke's uncle, said they've been blindsided by the tragedy.

"You never expect it to be, you know, part of your family," he said.

Photo: Kate Goodchild and Luke Dorsett

"For it to happen, and the way it has in the tragic incident, it really is hard to explain just how that's going to affect the family in the future."

Ms Turner also criticised Dreamworld owners Ardent Leisure for failing to contact them since the tragedy on Tuesday.

"We can't understand. We want to find out what happened and why."

Ardent chief executive Deborah Thomas was left embarrassed during a press conference following the company's AGM on Thursday, after it was revealed no one from the company had contacted Mrs Goodchild and Mr Dorsett's mother, Karen Dorsett.